Timberwerks - The choice of a Koralia 1 or 2 is one you'll have to make yourself. The #2 is more powerful, and a lot of folks opted for a #1. I have a #1 and I'm happy with it it. A lot depends on the corals you'll want - some of the soft corals could get too much flow if in front of a #2. Not an easy decision. Maybe someone else can help with other advice. Koralia has come out with a wavemaker that can be use with a couple Koralias plugged in, but it's pretty pricy. I think a wavemaker is usually used with 2 or more pumps, but I'm not 100% sure on that.
RyanMcLaughlin - Wow - I hate to recommend anyone mod a brand new tank till they see how things work. A Koralia is a good add to that upper back right corner. Or even a Tunze Nano Stream powerhead (costs more and about the same flow as a Koralia #2).
A lot of us found that cutting that black sponge down to 1-2 inches thick helps flow in the back. Keep what's left - it may be useful later.
Here's a quick & easy skimmer mod first put out by Hodge - it may or may not improve skimmer efficiency, but it does quiet the skimmer:
Skimmer Mod
Here's a page with a mod replacing one of the RSM powerheads with a Maxijet 1200 for more flow:
MJ 1200 Mod
And, not a mod, but when you get to placing corals in the tank here's the method I've been using with the best success for over a year now:
coral gluing
I usually use a "sandwhich" of superglue gel & epoxy. I mix up a ball of epoxy putty, appropriately sized (guesstimated) to the size of the coral base and the nature/texture of the rock where I want to place it - maybe the size of a marble, or bigger, for corals with a large bases. Then I dry off the coral base by blotting with a paper towel, make a depression in the soft putty ball, put in a big blob of SG Gel and press onto the dried coral base for a minute till it bonds a bit. I then make a depression in the bottom (other side)of the putty, fill that with another big blob of SG Gel and put the coral in the tank and slowly press it onto the rock and hold a minute till the glue bonds the soft putty to the rock before it hardens. SG Gel or Epoxy putty have never worked well for me, but the combination has done pretty well. Not always 100% but it usually work for me. And I've learned not to scrimp on the amount of SG Gel - I keep several tubes around - the bigger the blob the better the chance of it working. I'm basically using the putty to conform to the shape of the coral base and live rock, and the SG Gel on the top & bottom to bond it all onto the rock.
There are other mods out there, including replacing the skimmer, but I'd give the skimmer a chance before replacing it. It works great for many people, and not so great for many others. If it's not too late I'd try to leave at least 5-6 inches behind the tank and the wall, in case you ever want to put an overflow on for a sump or refugium. Next to impossible to move the tank once it's full of water! I wish I had left more space behind mine.
I really do recommend not doing too much till you see how everything works for a while. Most mods can be done later on. Just my opinion.
Your corals all seem to be doing very well with the stock lighting. I haven't changed my lights out either, I like them!! 
